<template>
  <div class="app-container">

    <!-- 搜索表单 -->
    <el-form ref="queryRef" :inline="true" label-width="68px">
      <el-form-item label="品牌名称" prop="name">
        <el-input
            placeholder="请输入品牌名称"
            clearable
            v-model="queryParams.name"
        />
      </el-form-item>
      <el-form-item>
        <el-button type="primary" icon="Search" @click="handleQuery">搜索</el-button>
        <el-button icon="Refresh" @click="resetQuery">重置</el-button>
      </el-form-item>
    </el-form>

    <!-- 功能按钮栏 -->
    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button
            type="primary"
            plain
            icon="Plus"
            @click="handleAdd"
        >新增</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
            type="success"
            plain
            icon="Edit"
            :disabled="single"
            @click="handleUpdate"
        >修改</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
            type="danger"
            plain
            icon="Delete"
            :disabled="multiple"
            @click="handleDelete"
        >删除</el-button>
      </el-col>
    </el-row>

    <!-- 新增或修改分类品牌对话框 -->
    <el-dialog :title="title" v-model="open" width="500px" append-to-body>
      <el-form ref="brandRef" :model="form" :rules="rules" label-width="80px">
        <el-form-item label="品牌名称" prop="name">
          <el-input v-model="form.name" placeholder="请输入品牌名称" />
        </el-form-item>
        <el-form-item label="品牌图标" prop="logo">
          <el-upload
              class="avatar-uploader"
              :action="imgUpload.url"
              :headers="imgUpload.headers"
              :show-file-list="false"
              :on-success="handleAvatarSuccess"
              :before-upload="beforeAvatarUpload"
          >
            <img v-if="form.logo" :src="form.logo" class="avatar" />
            <el-icon v-else class="avatar-uploader-icon"><Plus /></el-icon>
          </el-upload>
        </el-form-item>
      </el-form>
      <template #footer>
        <div class="dialog-footer">
          <el-button type="primary" @click="submitForm">确 定</el-button>
          <el-button @click="cancel">取 消</el-button>
        </div>
      </template>
    </el-dialog>

    <!-- 数据展示表格 -->
    <el-table :data="brandList" v-loading="loading" @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55" align="center" />
      <el-table-column label="品牌名称" prop="name" width="200"/>
      <el-table-column label="品牌图标" prop="logo" #default="scope">
        <img :src="scope.row.logo" width="50" />
      </el-table-column>
      <el-table-column prop="createTime" label="创建时间" />
      <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
        <template #default="scope">
          <el-button link type="primary" icon="Edit" @click="handleUpdate(scope.row)">修改</el-button>
          <el-button link type="primary" icon="Delete" @click="handleDelete(scope.row)">删除</el-button>
        </template>
      </el-table-column>
    </el-table>

    <!-- 分页条组件 -->
    <pagination
        v-show="total>0"
        :total="total"
        v-model:page="queryParams.pageNum"
        v-model:limit="queryParams.pageSize"
        @pagination="getList"
    />

  </div>

</template>

<script setup name="Brand">

//========================1.导入区域========================

import {listBrand,addBrand,getBrand,updateBrand,delBrand} from '@/api/product/brand'
import {getToken} from '@/utils/auth'
import {ElMessage, ElMessageBox} from "element-plus"
const { proxy } = getCurrentInstance();

//========================2.变量区域========================

//定义分页列表数据模型
const brandList = ref([ ]);
//定义列表总记录数模型
const total = ref(2);
//加载数据时显示的动效控制模型
const loading = ref(false);

//Vue 3 中的两种响应式数据绑定方式：reactive 和 ref
//ref定义：基本数据类型，适用于简单的响应式数据
//reactive定义：对象（或数组）数据类型，则适用于复杂对象或数组的响应式数据
const data=reactive({
  //定义搜索模型
  queryParams:{
    name:null,
    pageNum:1,
    pageSize:10
  },
  form:{},
  imgUpload:{
    headers:{
      Authorization:"Bearer " + getToken()
    },
    url:import.meta.env.VITE_APP_BASE_API + "/file/upload"
  },
  //定义表单校验模型
  rules:{
    name:[{required:true,message:"品牌名称不能为空",trigger:"blur"}],
    logo:[{required:true,message:"品牌LOGO不能为空",trigger:"blur"}],
  }
})

//新增与修改弹出层控制模型
const  open=ref(false)

//新增与修改弹出层标题模型
const  title=ref("")

//定义批量操作id列表模型
const  ids=ref([]);

//定义单选控制模型
const  single=ref(true)

//定义多选控制模型
const  multiple=ref(true)

//使用 Vue.js 的 Composition API 中的 toRefs 函数将 data 对象的属性转换为响应式引用。queryParams 是一个响应式引用，
// 它指向 data 对象中的 queryParams 属性。这样，当 queryParams 的值发生变化时，任何依赖于它的组件都将自动更新。
const {queryParams,form,imgUpload,rules} = toRefs(data);
//========================3.事件处理区域========================

/** 查询品牌列表 */
function getList() {
  loading.value=true
  listBrand(queryParams.value).then((result)=>{
    loading.value=false
brandList.value=result.rows
    total.value=result.total
  })
  }
/** 搜索按钮操作 */
function handleQuery() {
  getList()
}

/** 重置按钮操作 */
function resetQuery() {
  queryParams.value.pageNum = 1;
  queryParams.value.pageSize = 10;
  queryParams.value.name = null
  handleQuery();
}

//执行查询品牌列表
getList();

//表单重置
function  reset(){
  form.value={
    id:null,
    name:null,
    logo:null
  };
}

//新增按钮操作
function handleAdd(){
  reset();
  open.value=true;
  title.value="添加品牌";
}

//上传
function handleAvatarSuccess(result,uploadFile){
  form.value.logo=result.data.url
  proxy.$refs['brandRef'].clearValidate('logo')
}

//文件上传类型和大小检验
const beforeAvatarUpload= (rawFile) => {
  if (rawFile.type !== 'image/jpeg') {
    ElMessage.error('图片必须是JPG格式')
    return false
  } else if (rawFile.size / 1024 / 1024 > 1) {
    ElMessage.error('图片大小不能超过1MB!')
    return false
  }
  return true
}

//取消按钮
function  cancel(){
  open.value=false;
  reset();
}

//修改按钮
function handleUpdate(row) {
  reset();
  const _id = row.id || ids.value
  getBrand(_id).then(result => {
    form.value = result.data;
    open.value = true;
    title.value = "修改品牌";
  });
}
//提交按钮
function submitForm() {
  proxy.$refs["brandRef"].validate(valid=>{
    if (valid){
      if (form.value.id != null) {
        updateBrand(form.value).then(result => {
          ElMessage.success("修改成功");
          open.value = false;
          getList()
        });
      } else {
        addBrand(form.value).then(result => {
          ElMessage.success("添加成功")
          open.value = false;
          getList()
        });
      }
    }
  })
}

//删除按钮
function handleDelete(row){
  const  _ids=row.id || ids.value;
  ElMessageBox.confirm('您确定要删除吗', "系统提示", {
    confirmButtonText:'确定',
    cancelButtonText:'取消',
    type:"warning",
  }).then(function (){
    return delBrand(_ids);
  }).then(()=>{
    getList();
    ElMessage.success("删除成功")
  }).catch(()=>{});
}

//小方框多选框选中数据
function handleSelectionChange(selection){
  ids.value=selection.map(item=>item.id);
  single.value=selection.length != 1;
  multiple.value= !selection.length;
}
</script>

<!--  上传组件样式-->
<style scoped>
.avatar-uploader .avatar {
  width: 178px;
  height: 178px;
  display: block;
}
</style>
<style>
.avatar-uploader .el-upload {
  border: 1px dashed var(--el-border-color);
  border-radius: 6px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: var(--el-transition-duration-fast);
}

.avatar-uploader .el-upload:hover {
  border-color: var(--el-color-primary);
}

.el-icon.avatar-uploader-icon {
  font-size: 28px;
  color: #8c939d;
  width: 178px;
  height: 178px;
  text-align: center;
}
</style>